<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 、卡片视图区 -->
        <el-card>
            <!-- 提示区域 -->
            <el-alert title="添加商品" type="info" center show-icon :closable="false">
            </el-alert>
            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center="">
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" label-width="100px" label-position="top" ref="addFormRef">
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave"
                    @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps"
                                @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!-- 渲染表单的item项 -->
                        <el-form-item :label="item.attr_name" v-for="item in manyTabListData" :key="item.attr_id">
                            <!-- 复选框 -->
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border size="mini">
                                </el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTabListData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove"
                            list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件,且不超过500kb</div>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器组件 -->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <!-- 添加商品的按钮 -->
                    <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                    
                </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览 -->
        <el-dialog title="图片预览" :visible.sync="preViewVisible" width="50%">
            <img src="previewPath" alt="" class="previewImage">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data() {
        return {
            activeIndex: '0',
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                // 商品所属的分类数组
                goods_cat: [],
                // 图片数组
                pics: [],
                previewPath: '',
                goods_introduce:'',
                attrs:[]
            },
            addFormRules: {
                goods_name: [
                    { required: true, message: '请输入商品名称', trigger: 'blur' },
                ],
                goods_price: [
                    { required: true, message: '请输入商品价格', trigger: 'blur' },
                ],
                goods_weight: [
                    { required: true, message: '请输入商品重量', trigger: 'blur' },
                ],
                goods_number: [
                    { required: true, message: '请输入商品数量', trigger: 'blur' },
                ],
                goods_cat: [
                    { required: true, message: '请请选择商品分类', trigger: 'blur' },
                ]
            },
            // 商品分类列表
            catelist: [],
            cateProps: {
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            // 动态参数列表数据
            manyTabListData: [],
            // 静态属性列表数据
            onlyTabListData: [],
            // 图片上传url
            uploadURL: 'https://lianghj.top:8888/api/private/v1/upload',
            // 图片上传组件的headers 携带token
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            // 控制图片预览框的显示与隐藏
            preViewVisible:false
        }
    },
    created() {
        this.getCateList()
    },
    methods: {
        async getCateList() {
            const { data: res } = await this.$http.get("categories")
            if (res.meta.status !== 200) {
                return this.$message.error("获取数据列表失败")
            }
            this.catelist = res.data
            // console.log(this.catelist);
        },
        // 级联选择器选中项变化，触发这个函数
        handleChange() {
            // console.log(1);
            if (this.addForm.goods_cat.length !== 3) {
                this.addForm.goods_cat = []
            }
        },
        beforeTabLeave(activaName, oldActiveName) {
            if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
                this.$message.error("请先选择商品分类")
                return false
            }
            return true
        },
        async tabClicked() {
            if (this.activeIndex === '1') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params: { sel: 'many' }
                })
                if (res.meta.status !== 200) {
                    return this.$message.error("获取参数列表失败")
                }

                res.data.forEach(item => {
                    item.attr_vals =
                        item.attr_vals.length === 0 ? []
                            : item.attr_vals.split(" ")
                })
                this.manyTabListData = res.data

                // console.log(res.data);
            } else if (this.activeIndex === '2') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params: { sel: 'only' }
                })
                if (res.meta.status !== 200) {
                    return this.$message.error("获取属性列表失败")
                }
                this.onlyTabListData = res.data
                // console.log(res.data);
            }
        },
        // 处理图片预览
        handlePreview(file) {
            this.previewPath = file.response.data.url
            // console.log(file);
            this.preViewVisible = true
        },
        // 处理图片删除 
        handleRemove(file) {
            // 1.获取将要删除的图片的临时路径
            const filePath = file.response.data.tmp_path
            // 2.从pics数组中，找到这个图片对应的索引值
            const i = this.addForm.pics.findIndex(x => x.pic === filePath)
            // 3.调用数组的splice方法，把图片信息对象，从pics数组中移除
            this.addForm.pics.splice(i, 1)
            // console.log(this.addForm);
        },
        // 监听图片上传的事件
        handleSuccess(response) {
            // 1.拼接得到一个图片信息对象
            const picInfo = { pic: response.data.tmp_path }
            // 2.将图片信息对象push搭配pics数组中
            this.addForm.pics.push(picInfo)
            // console.log(this.addForm);
        },
        add(){
            this.$refs.addFormRef.validate( async valid =>{
                if(!valid){
                    return this.$message.error('请填写必要的表单项！')
                }
               const form = _.cloneDeep(this.addForm)
               form.goods_cat = form.goods_cat.join(',')
            //    console.log(form);
            //    处理动态参数
            this.manyTabListData.forEach(item=>{
                const newInfo = {
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals.join(' ')
                    
                }
                this.addForm.attrs.push(newInfo)
            })
            // 处理静态属性
            this.onlyTabListData.forEach(item=>{
                const newInfo = {
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals
                    }
                this.addForm.attrs.push(newInfo)
            })
            form.attrs = this.addForm.attrs
            //    console.log(form);
                // 发起请求添加商品
                // 商品的名称必须是 唯一的
               const{data:res}=await  this.$http.post("goods",form)
            //    if(res.meta.status !==201){
            //     return this.$message.error("添加商品失败")
                
            //    }
               console.log(res);
               this.$message.success("添加商品成功")
               this.$router.push('/goods')

            })
            
        }
    },
    computed: {
        cateId() {
            if (this.addForm.goods_cat.length === 3) {
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>

<style scoped lang="less">
.previewImage{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>